CN106498622B - Variable cross-section polygonal weaving core mold and assembling method thereof - Google Patents

Abstract

The invention relates to a polygonal braiding mandrel with variable cross-section, which is characterized in that it comprises a mandrel shaft, a long groove is formed on the mandrel shaft, and the long groove extends from the top of the mandrel shaft along the length direction of the mandrel shaft to The bottom end face of the mandrel shaft forms a through-slot end. There are multiple mandrel rings on the mandrel shaft. All mandrel rings are arranged along the length of the mandrel shaft. The inner ring surface of each mandrel ring is provided with The protrusions matched with the long grooves, the blocking rods matched with the long grooves are arranged between the protrusions of the adjacent two core mold rings, and the locking blocking rods are fixedly connected with the core mold shaft. There are N positioning rods evenly distributed on the outer circumferential surface of the ring along the circumferential direction, N≥3, and the cover body parts are supported by the positioning rods. Another technical solution of the present invention is to provide a method for assembling a polygonal braiding core mold with a variable cross-section. The advantages of the present invention adopting the above technical solutions are as follows: 1. Simple structure, light weight, and strong versatility; 2. Easy to manufacture, convenient for drafting, and less time-consuming.

Description

Variable cross-section polygonal braiding mandrel and its assembling method

technical field

The invention relates to a weaving mandrel and an assembling method thereof, in particular to a polygonal braiding mandrel with variable cross-section and an assembly method thereof, belonging to the technical field of textiles.

Background technique

The braiding machine has excellent profiling and weaving ability, and can weave preforms of different shapes depending on the core mold to meet the requirements of mechanical properties of composite materials such as military industry and aerospace. The profiling ability of the braiding machine depends on the mandrel. On the premise of ensuring the outer size and shape of the mandrel, reducing the weight of the mandrel and reducing the difficulty of drafting the braid are urgent problems to be solved.

SUMMARY OF THE INVENTION

The technical problems to be solved by the present invention are: the existing core mold is heavy, the mold drafting is difficult and time-consuming.

In order to solve the above technical problems, a technical solution of the present invention is to provide a polygonal braiding mandrel with variable cross-section, which is characterized in that it includes a mandrel shaft, and a long groove is formed on the mandrel shaft, and the long groove is formed from the mandrel shaft. The top of the mandrel shaft extends along the length direction of the mandrel shaft to the bottom end face of the mandrel shaft, thereby forming a through-slot end. There are multiple mandrel rings on the mandrel shaft, and all the mandrel rings are arranged along the length of the mandrel shaft. The inner ring surface of each core die ring is provided with a protrusion that matches the long groove, and between the protrusions of two adjacent core die rings is provided with a blocking rod that matches the long groove, close to the core die axis The mandrel ring on the bottom end face is axially positioned by the blocking rods on both sides and the locking blocking rod, and the other mandrel rings are axially positioned by the blocking rods on both sides, and the locking blocking rod is fixedly connected with the mandrel shaft. N locating rods are evenly distributed along the circumferential direction on the outer circumferential surface of the die ring, N ≥ 3, and the cover parts are supported by the locating rods.

Preferably, the cover body part includes a cover body and support rod parts located at N corners of the cover body, and the cover body and the support rod are sewn into one piece.

Preferably, N annular holes are uniformly distributed along the circumferential direction on the outer circumferential surface of the core die ring, one end of one of the positioning rods is fixedly connected to one of the annular holes, and the other end is connected to the corresponding position of the annular hole. The support rod parts are fixedly connected.

Preferably, two ends of the positioning rod are respectively provided with a split ring, the split ring at one end is matched with the circular hole, and the split ring at the other end is matched with the support rod part at the corresponding position.

Preferably, the length of the long groove of the mandrel shaft is L ₁ , the length of the mandrel shaft is L ₂ , the length of the i-th blocking rod is c _i , i=1, 2,...,n , n is the total number of blocking rods, and the length of the locking blocking rod is c, then: L ₁ <L ₂ , c ₁ +...+c _n +c>L ₁ .

Preferably, each of the support rod components includes n support rods, the length of the i-th support rod is a _i , and its two ends are respectively connected with the i-th positioning rod and the i+1-th positioning rod, and are connected with the i-th positioning rod and the i+1-th positioning rod respectively. Corresponding to the i-th block rod, the length of the i-th positioning rod is b _i , and the length of the i+1-th positioning rod is b _i+1 : then a _i ² =(b _i -b _i+1 ) ² +c _i ² .

Preferably, the blocking rod, the locking blocking rod and the core die ring are bonded with a high-strength adhesive; the locking blocking rod is fixedly connected to the core die ring through a set screw.

Preferably, the cover body is stitched from a plurality of high-strength fabrics.

Another technical solution of the present invention is to provide a method for assembling a polygonal braided core mold with variable cross-section, which is characterized in that it includes the following steps:

The first step is to insert the first mandrel ring into the mandrel shaft from the through-groove end of the long groove of the mandrel shaft, insert the first stop rod into the long groove, and use a high strong adhesive bond;

The second step is to use the same method as the first step to assemble other core mold rings and corresponding blocking rods in turn. When the last core mold ring is inserted, insert the locking blocking rod, and connect the locking blocking rod to the core mold shaft. connected by set screws;

The third step is to insert the split ring at one end of the positioning rod corresponding to the first core mold ring into the circular hole evenly distributed outside the first core mold ring, and insert the split ring at the other end of the positioning rod into the support rod. In the connecting ring, then, assemble the positioning rods on the other core mold rings in sequence;

The fourth step is to sew the cover body and the corresponding support rod into one piece.

Preferably, a drafting step is also included:

After fixing the non-through-groove end of the long groove on the mandrel shaft, take out the set screw, and then use the tool to clamp the locking bar and pull it out to complete the overall demoulding.

The advantages of the present invention adopting the above technical solutions are as follows: 1. Simple structure, light weight, and strong versatility; 2. Easy to manufacture, convenient for drafting, and less time-consuming.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the internal assembly schematic diagram of the present invention;

Fig. 3 is a schematic diagram of the structure of the core die ring;

Fig. 4 is a structural schematic diagram of a positioning rod;

Figure 5 is an enlarged view of the connection between the core die ring and the positioning rod;

6 is a schematic diagram of the assembly of the connecting ring;

Figure 7 is a schematic diagram of the length of the support rod.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

1 and 2, the present invention provides a polygonal braided mandrel with a variable cross-section including a mandrel shaft 1 with a long groove, a plurality of mandrel rings 2 (such as 3), a plurality of blocking rods 6 and a locking blocking rod 8 installed in the groove of the mandrel shaft 1 for the axial positioning of the mandrel ring 2, and connecting the locking blocking rod 8 and the mandrel shaft 1 The set screw 9, the positioning rod 3 connected with the annular holes evenly distributed outside the core die ring 2, the connecting ring 5 connected with the other end of the positioning rod 3, the support rod 4 welded with the connecting ring 5 at one end, and the support rod 4 The integrated cover 7 is sewn.

One end of the long groove of the mandrel shaft 1 is a through-slot end, and the other end is a through-slot end. A threaded hole is provided on the portion of the long groove close to the end of the through groove. The locking bar 8 has the same cross-sectional shape and size as the bar 6 , and one end of the locking bar 8 is provided with a round hole, which is connected with the threaded hole in the long groove of the mandrel shaft 1 through a set screw 9 .

The length of the long groove of the mandrel shaft 1 is L ₁ , the length of the mandrel shaft 1 is L ₂ , and the length of the i-th blocking rod 6 is ci, i=1, 2, ..., n, n is the total length of the blocking rod. The number, the length of the locking bar 8 is c, and the above parameters are all determined by the core mold structure, as follows: L ₁ <L ₂ , c ₁ +...+c _n +c>L ₁ .

The blocking rod 6, the locking blocking rod 8 and the core die ring 2 are bonded with high-strength adhesive.

The two ends of the positioning rod 3 are provided with open rings, as shown in Figure 4, which can be respectively connected with the circular ring and the connecting ring 5 that are evenly distributed outside the core die ring 2. As shown in Figure 5 and Figure 6, the i-th positioning rod 3 The length is b _i , i=1, 2, ..., n, n+1, which is determined by the structure of the core mode.

The number of annular holes evenly distributed outside the core mold ring 2, the number of positioning rods 2 connected to it, and the number of support rods 4 connected to the positioning rod 2 are determined by the number of polygonal sides of the core mold.

7, the length of the i-th support rod 4 is a _i , and its two ends are respectively connected with the i-th positioning rod 3 and the i+1-th positioning rod 3, and corresponding to the i-th block rod 6, The i-th positioning rod 3 has a length of b _i , and the i+1-th positioning rod 3 has a length of b _i+1 : a _i ² =(b _i -b _i+1 ) ² +c _i ² .

The cover body 7 is stitched by a plurality of high-strength fabrics, and the number and size of the fabrics are determined by the structure of the core mold.

The core mold assembly steps are:

The first step is to insert the first mandrel ring 2 from the through-slot end of the long groove of the mandrel shaft 1 into the mandrel shaft 1, insert the first blocking rod 6 into the long groove, and connect the blocking rod 6 to the shaft. The mandrel ring 2 is bonded with a high-strength adhesive.

The second step is to assemble the other core mold rings 2 and the corresponding blocking rods 6 in turn by the same method as the first step. When the last core mold ring 2 is inserted, insert the locking blocking rod 8 and lock the blocking rod. 8 and the mandrel shaft 1 are connected by a set screw 9 .

The third step is to insert the split ring at one end of the positioning rod 3 corresponding to the first core mold ring 2 into the circular hole evenly distributed outside the first core mold ring 2, and cover the split ring at the other end of the positioning rod 3 into the connecting ring 5 of the support rod 4 , and then assemble the positioning rods 3 on the other core die rings 2 in sequence. Preferably, the connecting ring 5 is welded integrally with the support rod 4 .

The fourth step is to sew the cover body 7 and the corresponding support rod 4 into one body.

The drafting step is as follows: after fixing the non-through-groove end of the long groove on the mandrel shaft, take out the set screw 9, and then clamp the locking stopper 8 with a tool and pull it outward to complete the overall demoulding.

Claims (10)

1. a kind of variable cross-section polygon weaves core model, which is characterized in that including core model axis (1), it is recessed that length is provided on core model axis (1) Slot, long recess extend to the bottom end face of core model axis (1) from the top of core model axis (1) along the length direction of core model axis (1), To form through slot end, multiple core model circles (2), length of all core model circles (2) along core model axis (1) are cased with outside core model axis (1) Direction arrangement, the inner ring surface of each core model circle (2) are equipped with the protrusion matched with long recess, two neighboring core model circle (2) The bar (6) matched with long recess is equipped between protrusion, the core model circle (2) close to core model axis (1) bottom end face passes through two sides Bar (6) and locking bar (8) axially position, the side of the core model circle (2) be bar (6), the other side is locking bar (8), other core model circles (2) are locked bar (8) by bar (6) axially position being arranged between two neighboring core model circle (2) It is fixedly connected with core model axis (1), is distributed along the circumference with N root locating rod (3) on the outer circumference surface of each core model circle (2), N >=3, Cover component is supported by locating rod (3).

2. a kind of variable cross-section polygon as described in claim 1 weaves core model, which is characterized in that the cover component includes cover Body (7) and the rod member for being located at cover (7) N number of corner, cover (7) and rod member sewing one.

3. a kind of variable cross-section polygon as claimed in claim 2 weaves core model, which is characterized in that in the core model circle (2) N number of annulus hole, one end of a locating rod (3) and the fixed company of an annulus hole are distributed along the circumference on outer circumference surface It connects, the other end is fixedly connected with the rod member of corresponding position.

4. a kind of variable cross-section polygon as claimed in claim 3 weaves core model, which is characterized in that in the locating rod (3) Both ends are respectively equipped with a split ring, and the split ring of one end is matched with the annulus hole, the split ring and corresponding positions of the other end The rod member set matches.

5. a kind of variable cross-section polygon as described in claim 1 weaves core model, which is characterized in that the length of the core model axis (1) Groove length is L₁, the length of the core model axis (1) is L₂, the length of i-th bar (6) is c_i, i=1,2 ..., n, n Length for the total number of bar (6), locking bar (8) is c, then has: L₁<L₂, c₁+…+c_n+c>L₁。

6. a kind of variable cross-section polygon as claimed in claim 2 weaves core model, which is characterized in that each rod member Including n root support rod (4), the length of i-th support rod (4) is a_i, both ends respectively with i-th locating rod (3) and i+1 root Locating rod (3) is connected, and corresponding with i-th section bar (6), and the length of i-th locating rod (3) is b_i, i+1 root locating rod (3) length is b_i+1: then there is a_i ²=(b_i-b_i+1)²+c_i ², c_iFor the length of i-th bar (6).

7. a kind of variable cross-section polygon as described in claim 1 weaves core model, which is characterized in that the bar (6), the lock Tight bar (8) and the core model circle (2) are bonded using high-strength adhesive；The locking bar (8) by holding screw (9) with The core model axis (1) is fixedly connected.

8. a kind of variable cross-section polygon as claimed in claim 2 weaves core model, which is characterized in that the cover (7) is by muti-piece High-intensitive cloth sutures.

9. a kind of assembly method of variable cross-section polygon braiding core model as claimed in claim 6, which is characterized in that including following Step:

The first step, after first core model circle (2) is entered core model axis (1) from the through slot end cap of core model axis (1) long recess, in long recess First bar (6) of interior insertion, and bar (6) and core model circle (2) are bonded using high-strength adhesive；

Second step successively assembles other core model circles (2) and corresponding bar (6) using method identical with the first step, when being inserted in After the last one core model circle (2), insertion locking bar (8), and clamp screw will be passed through between locking bar (8) and core model axis (1) Follow closely (9) connection；

The split ring of locating rod (3) one end corresponding with first core model circle (2) is inserted in first core model circle (2) by third step In outer uniformly distributed annulus hole, the split ring of locating rod (3) other end is inserted in the connection ring (5) of support rod (4), later, according to The secondary locating rod (3) assembled on other core model circles (2)；

Cover (7) is sewed one with corresponding support rod (4) by the 4th step.

10. a kind of assembly method of variable cross-section polygon braiding core model as claimed in claim 9, which is characterized in that further include pulling out Mould step:

By on core model axis long recess without through slot end it is fixed after, take out holding screw (9), then clamp locking bar with tool (8) it is pulled outwardly, completes whole demoulding.